w3resource

PHP: is_scalar() function

Description

The is_scalar() function is used to check whether a variable is a scalar or set or not.
Note :
Variables which contain boolean, double, integer, or string types are scalar. Array, object, and resource are not scalar.

Version:

(PHP 4 and above)

Syntax:

is_scalar(variable_name) 

Parameter:

Name Description Required /
Optional
Type
variable_name The variable being checked Required Mixed*

*Mixed: Mixed indicates that a parameter may accept multiple (but not necessarily all) types.

Return value:

TRUE if variable_name is a scalar, FALSE otherwise.

Value Type: Boolean

Example:

<?php
$var1 = 100;
if (is_scalar ($var1))
echo $var1. ' is a scalar value'.'<br>';
else
echo $var1.' is not a  scalar value'.'<br>';
$var2 = array(1);
if (is_scalar ($var2))
echo $var2. ' is a scalar value'.'<br>';
else
echo  $var2. ' is not a  scalar value'.'<br>';
?>

Output :

100 is a scalar value
Array is not a  scalar value

View the example in the browser

Practice here online :

See also

PHP Function Reference

Previous: is_resource
Next: is_string



PHP: Tips of the Day

PHP - how to create a newline character?

Only double quoted strings interpret the escape sequences \r and \n as '0x0D' and '0x0A' respectively, so you want:

"\r\n"

Single quoted strings, on the other hand, only know the escape sequences \\ and \'.

So unless you concatenate the single quoted string with a line break generated elsewhere (e. g., using double quoted string "\r\n" or using chr function chr(0x0D).chr(0x0A)), the only other way to have a line break within a single quoted string is to literally type it with your editor:

$s = 'some text before the line break
some text after';

Make sure to check your editor for its line break settings if you require some specific character sequence (\r\n for example).

Ref : https://bit.ly/3hcyege